ForgePatch/common/net/minecraftforge/liquids/LiquidDictionary.java

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package net.minecraftforge.liquids;
import java.util.HashMap;
import java.util.Map;
import net.minecraft.block.Block;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.Event;
import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;
import com.google.common.collect.ImmutableMap;
/**
* When creating liquids you should register them with this class.
*
* @author CovertJaguar <railcraft.wikispaces.com>
*/
public abstract class LiquidDictionary
{
private static BiMap<String, LiquidStack> liquids = HashBiMap.create();
/**
* When creating liquids you should call this function.
*
* Upon passing it a name and liquid item it will return either
* a preexisting implementation of that liquid or the liquid passed in.
*
*
* @param name the name of the liquid
* @param liquid the liquid to use if one doesn't exist
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* @return the matching liquid stack
*/
public static LiquidStack getOrCreateLiquid(String name, LiquidStack liquid)
{
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if (liquid == null)
{
throw new NullPointerException("You cannot register a null LiquidStack");
}
LiquidStack existing = liquids.get(name);
if(existing != null) {
return existing.copy();
}
liquids.put(name, liquid.copy());
MinecraftForge.EVENT_BUS.post(new LiquidRegisterEvent(name, liquid));
return liquid;
}
/**
* Returns the liquid matching the name,
* if such a liquid exists.
*
* Can return null.
*
* @param name the name of the liquid
* @param amount the amout of liquid
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* @return a liquidstack for the requested liquid
*/
public static LiquidStack getLiquid(String name, int amount)
{
LiquidStack liquid = liquids.get(name);
if(liquid == null)
return null;
liquid = liquid.copy();
liquid.amount = amount;
return liquid;
}
public static LiquidStack getCanonicalLiquid(String name)
{
return liquids.get(name);
}
/**
* Get an immutable list of the liquids defined
*
* @return the defined liquids
*/
public static Map<String, LiquidStack> getLiquids()
{
return ImmutableMap.copyOf(liquids);
}
/**
* Fired when a new liquid is created
*
*/
public static class LiquidRegisterEvent extends Event
{
public final String Name;
public final LiquidStack Liquid;
public LiquidRegisterEvent(String name, LiquidStack liquid)
{
this.Name = name;
this.Liquid = liquid.copy();
}
}
static
{
getOrCreateLiquid("Water", new LiquidStack(Block.waterStill, LiquidContainerRegistry.BUCKET_VOLUME));
getOrCreateLiquid("Lava", new LiquidStack(Block.lavaStill, LiquidContainerRegistry.BUCKET_VOLUME));
}
public static String findLiquidName(LiquidStack reference)
{
if (reference != null)
{
return liquids.inverse().get(reference);
}
else
{
return null;
}
}
public static LiquidStack getCanonicalLiquid(LiquidStack liquidStack)
{
return liquids.get(liquids.inverse().get(liquidStack));
}
}